Vapor Liquid Equilibria Modeling for Strong Zeotropic Ternary System of R1234yf/R170/R14
The excess Gibbs free energy-equation of state "(" "G" ^"E" "-EoS) " is a new method for predicting the vapor liquid equilibrium (VLE) with respect to the equation of state (EoS) and activity coefficient method. In this study, the Peng Robinson (PR) equation...
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Journal of Refrigeration Magazines Agency Co., Ltd.
2018-01-01
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| Series: | Zhileng xuebao |
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| Online Access: | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2018.02.048 |
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| author | Qin Yanbin Zhang Hua Meng Zhaofeng Zhou Guoliang |
| author_facet | Qin Yanbin Zhang Hua Meng Zhaofeng Zhou Guoliang |
| author_sort | Qin Yanbin |
| collection | DOAJ |
| description | The excess Gibbs free energy-equation of state "(" "G" ^"E" "-EoS) " is a new method for predicting the vapor liquid equilibrium (VLE) with respect to the equation of state (EoS) and activity coefficient method. In this study, the Peng Robinson (PR) equation of state was employed in combination with the Wong-Sandler (WS) mixing rule to predict binary and ternary systems coupled with the activity coefficient model: the modified universal quasichemical functional group activity coefficient (UNIFAC) used in the predictive Soave-Redlich-Kwong (PSRK). So a gas-liquid equilibrium prediction model of the mixture (PRWS-UNIFAC-PSRK) was constructed EoS (PRWS-UNIFAC-PSRK model). The to calculated VLE data of R161/R1234yf, R32/R125/R134a, and the strong zeotropic ternary system of R1234yf/R170/R14 were calculated. The results indicated that for R161/R1234yf, the relative deviation of the pressures and the absolute deviation of the vapor phase mass fraction between the experimental and calculated data were within ±1.5% and ±0.02, respectively, which were better than those found using the REFPROP9.0 software, while the deviations for R32/R125/R134a were within ±4% and ±0.02, respectively. The calculated VLE data and three-dimensional phase equilibrium diagrams showed that the temperature glide phenomenon of R1234yf/R170/R14 was the most obvious at the mass fraction ratio of 0.4/0.2/0.4, and the maximum sliding temperature reached 72.5 K. The dew-point and bubble-point temperatures increased with the increase in the mass fraction of R1234yf. |
| format | Article |
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| issn | 0253-4339 |
| language | zho |
| publishDate | 2018-01-01 |
| publisher | Journal of Refrigeration Magazines Agency Co., Ltd. |
| record_format | Article |
| series | Zhileng xuebao |
| spelling | doaj-art-a609c6d070d043db818438d9ad5cdcc52025-08-20T02:02:54ZzhoJournal of Refrigeration Magazines Agency Co., Ltd.Zhileng xuebao0253-43392018-01-013966512561Vapor Liquid Equilibria Modeling for Strong Zeotropic Ternary System of R1234yf/R170/R14Qin YanbinZhang HuaMeng ZhaofengZhou GuoliangThe excess Gibbs free energy-equation of state "(" "G" ^"E" "-EoS) " is a new method for predicting the vapor liquid equilibrium (VLE) with respect to the equation of state (EoS) and activity coefficient method. In this study, the Peng Robinson (PR) equation of state was employed in combination with the Wong-Sandler (WS) mixing rule to predict binary and ternary systems coupled with the activity coefficient model: the modified universal quasichemical functional group activity coefficient (UNIFAC) used in the predictive Soave-Redlich-Kwong (PSRK). So a gas-liquid equilibrium prediction model of the mixture (PRWS-UNIFAC-PSRK) was constructed EoS (PRWS-UNIFAC-PSRK model). The to calculated VLE data of R161/R1234yf, R32/R125/R134a, and the strong zeotropic ternary system of R1234yf/R170/R14 were calculated. The results indicated that for R161/R1234yf, the relative deviation of the pressures and the absolute deviation of the vapor phase mass fraction between the experimental and calculated data were within ±1.5% and ±0.02, respectively, which were better than those found using the REFPROP9.0 software, while the deviations for R32/R125/R134a were within ±4% and ±0.02, respectively. The calculated VLE data and three-dimensional phase equilibrium diagrams showed that the temperature glide phenomenon of R1234yf/R170/R14 was the most obvious at the mass fraction ratio of 0.4/0.2/0.4, and the maximum sliding temperature reached 72.5 K. The dew-point and bubble-point temperatures increased with the increase in the mass fraction of R1234yf.http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2018.02.048vapor liquid equilibriaG^EEoS modelmixed refrigerantstemperature glideR1234yf |
| spellingShingle | Qin Yanbin Zhang Hua Meng Zhaofeng Zhou Guoliang Vapor Liquid Equilibria Modeling for Strong Zeotropic Ternary System of R1234yf/R170/R14 Zhileng xuebao vapor liquid equilibria G^EEoS model mixed refrigerants temperature glide R1234yf |
| title | Vapor Liquid Equilibria Modeling for Strong Zeotropic Ternary System of R1234yf/R170/R14 |
| title_full | Vapor Liquid Equilibria Modeling for Strong Zeotropic Ternary System of R1234yf/R170/R14 |
| title_fullStr | Vapor Liquid Equilibria Modeling for Strong Zeotropic Ternary System of R1234yf/R170/R14 |
| title_full_unstemmed | Vapor Liquid Equilibria Modeling for Strong Zeotropic Ternary System of R1234yf/R170/R14 |
| title_short | Vapor Liquid Equilibria Modeling for Strong Zeotropic Ternary System of R1234yf/R170/R14 |
| title_sort | vapor liquid equilibria modeling for strong zeotropic ternary system of r1234yf r170 r14 |
| topic | vapor liquid equilibria G^EEoS model mixed refrigerants temperature glide R1234yf |
| url | http://www.zhilengxuebao.com/thesisDetails#10.3969/j.issn.0253-4339.2018.02.048 |
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